Molding apparatus.



W. H. FISHER.

MOLDING APPARATUS. APPLICATION FILED MAYM, 1909.

Patented Feb. 28, 1911;

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W. H. FISHER. MOLDING APPARATUS. I APPLIGATION rum) MAY 14, 1909.

v Patented Feb. 28,1911.

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UNITED STATES PATENT OFFICE.

wILLIs H. FISHER, or BALTIMORE, MARYLAND.

MOLDING IAPIPARATUS.

Specification of Letters Patent.

' Patented Feb. 28, 1911.

Application filed. May 14, 1909. Serial No. 495,852.

' This invention relates to a press or apparatus for molding blocks or other articles from concrete or other plastic materials, and particularly to an apparatus for manufacturing concrete building blocks.

The main object of the invention is to provide an apparatus of this character in which thepressure applying element of the molding mechanism is adapted in operation to apply great pressure upon the material and is vibrated in its pressure applying action so as to exert a pounding pressure, whereby the air held within cells in the body of the material will be displaced and the cells broken up to compress the material into a solid homogeneous mass, thus forming a block of high durability and strength and .practically impervious to moisture.

A further object of the invention is to provide an apparatus of this character embodying a series of molds adapted to be successively brought into registering-position with the pressure producing element, and whereby the parts maybe qulckly and convenientlyoperated to produce a maximum number of blocks within a minimum period of time, and further-to provide an apparatus of suflicient strength to withstand the imposed strainsand in which the pressure producing element is adapted to be operated .by an economical type of fluid pressure means A still further object o'f'the invention is to provide an apparatus which. may be readily operated and controlled by a minimum number of attendants, which may be employed for the production of either plain or ornamental blocks of any desired type, which is so constructed" as to insure the ex-' act registry of the parts of the molding mechanism when brought into operative position and to stay and strengthen the same to effectually sustain the strains transmitted during the formation of a block, and

- in which the mold boxes or chambers are of suehconstruction as to facilitate the dis; charge of the/completed block or article.

With these and other objects in View, the

' posed.

invention consists of the features of con-- struction, combination and arrangement of parts hereinafter fully described and claimed, reference being had to the accompanying drawings, in which Figure 1 is a side elevational view, with parts broken away, of a molding apparatus embodying my invention, showing one of the mold boxes arranged in line with the pressure producing element and another disposed 111 discharging posltion. Fig. 2 is a top plan view of the same with parts.

omitted and others partially broken away and indicated in dottedlines to better illustrate the construction. Fig. 3 is a top plan view of one of the mold boxes or chambers. Flg. 4 is an end elevation of the same. Fig. 7) is a view similar to I ig. 3, showing the movable partsof the mold block swung outward to open position. Fig. 6 is a transverse section through the mold box with parts arranged as shown in Fig. Fig. 7

is a transverse section through the upper framebeams, showing the manner of supporting the core or forming element. Fig. 8 is a sectional elevation illustrating the. means for locking the rotary carrier in its stationary positions. F 9 is a front elevational view of parts of the hydraulic pump. Figs. 10 and 11 are top plan and horizontal sectional views, of the :arrier frame .with the mold boxes removed.

The frame of the apparati'ls comprises a pair of sill beamsl and a pair of head beams 2, arranged one above the other and with the beams of each pair divergently dis- The sill beams rest upon and may be embedded in a bed of concrete or masonry 3 formed to provide a pit l. Extending upwardly from the converging ends of the beams l to and through the converging ends of the beams 2 is a tie or strainer rod 5, and connecting the divergent ends of the pairs of beams are similar tie or strainer rods 0 and 7, which rods are clamped to the respective beams by nuts 8"and are embedded at theirlower ends in the foundation 3.

The beams are preferably ,of the I-type and supports for a base or platform 9 constituting a part of the frame of a fluid pressure pumping mechanism hereinafter described,

which frame includes a pair of standards or 'u'pmghts l0 fixed at their lower ends to said 'base or platform and connected atdheir npper'ends With the beams-Q by coupling or tie plates 1-1..

' gupportedby the I at its lower end into the pit 4 is'a cylinder upper end of the raingjsaid head heing pro- 'Vld'fid Wit-h diverglng arms 15 having eyes- 1 6 slidably engaging the rods 6. andffl hy' which the ram-andi head 'are g nided in their i up and down'rnovelnents. Secnred'byholts 17 Rto the beams 2 aboveand in vertic al' lS'carrying a core or formingmember 1 19' adapted. to. produce a-cavity .in the block to be formed or togive any-other. desired coniiiuratio'n to one of the sides." of thefblock. T is coreorforming member isprovi'ded at; its ends with ears 20 connected by bolts 21 with-similar ears 22 on the'ends of the head 18, by which thecore isrendered-readily removable, so that difi'erent'siisesofcOrQS or cores designed to produce different con- 5 fignrations may be employed.-

Mounted to rot-ate uponthe redia -which forms agpivot support or axle',fis a rotating carrier ,23- comprising upper and lower skeleton. frames or splders, the 'lower' frame or spider consisting of an annular series of divergently arranged pairs; of radial arms 724:. extending 'equidistantly from a common huh or center j'ournaled on'the' (rod, While the upper frame or spider 25 is of substan t ally tr angnlar' form and provldesta br'acmg connection .betweenlthe mold boXes,-- a

plurality of hichareem Ioyed, and sim .ply rotates'with thelower s ider about the rod as a? center. The "outer ends of the respectivepairs of arms of the lowerspider or frame are "formed with upstanding lugs or'enlargem ei'lts 26, hichare preferably fiat faced on their outer sides and formed with sockets in which are fitted and secured the lowerends of guide rods 2? arrimged in pairs 'passing through and connected at their upper ends with the angles of the upper spider by nuts 28, seas to connect the. two frames-and spiders together andprd.

' vide a carrier of strong-and. durable const-ruction. The arms 23, carry'an annular rim Q9,Wl1l0l1 forms a part'oflhe l'ower frame or main structure of the carrier and which, in the rotation. of the carrier adapted to run .in contact with and he'supported by rollers 30- arrangedat suitable points inqthe'patjh of rotationotthe carrier, to maintain said carrier in a level posi .tion andto"assistfthefi'od and PLH'Ts of: the? 1min frame to sustain the weight of the 'carrier and the mold boxes. The carrier adapted to rotate'inthe direction or", the a1'-.

heants 1-, and elite-riding screws 40 'to-anfend fITalHQI COIDPG Q parallel ll connected hy-fayvert calf cross 1 ':'ce 12; The innerTends of thethars 1 bolts 44. .30 as to permit the'endgazelle to 'stvihg outwardly J .to. an. open p'osition f as 5 Formed or secured on 1 the v out er side-of. the}.

ends, of thewall and shaped to pioi'fide lockeaas'rermy. shown in Fig. 2,". arid arranged at a Q point 111' its path. of rotation. is a table or support atom which each" mold hoxpasses after the=formation of'the hloel; therein. and

size and-form for the production; of blocks or articles of any slit'able. dimensions and shapes. In the "present nstance; I. have.

shown three such boires supported eqt'iidis t'a ntly tipon'and project-111g heyondfthex .rler so: as i to be suoce'ssmely' hrough registering .rela'tionl-tvith "and between the ram and core 'hyinterlnittent incvementsof 81);: I the carrier m ts co1'1rse-of rotat1-om;' Eaehi ahnementwith the head ,1.4 1s;a1ba rfor head I carrier mount-ed for."Yertical-movement upon a pairoot the rods QTaIId-c MpriSGSj-HH inner or rear all'33 provided on-itsouter face with" a pair of: parallel .'longitudina-l' flanges etflhavin g'l openings 35.for the; sage of the rods 27-, by-Whichthehox-is sup ported "and mounted to slide fapon j-the rods. Adjacent"thedowelcorners of ..th e.

. Wall. are forlnedilngs' to which are '90- bolted, as at 37 ha 3'8" form in g "hottoinend bars otjth'e :I'nold.strncture. The "end 3115.

.off' the; mold ho sz are formed by pattern 39 which "are d etachahlyfsecure h'v f I 41 are curved. inwardly in, rear-0'1. he fivall 33 t'oiform knuckles 43 which arel'nnged to;

theends of the ribs or flung-e534 by pins or" too showh in Fig's." 5 an'd'tl; The onterorifront Wall-45 ofzthe inoldhox'is hingedor pivoted at its lower corner edges npon'J-pins for '1 screws a6" 'eXtendi-ng' th'rongh the- -onter ends of the bars 38. Which'pins screws also enter the adjacent end edges nf-thel bot-torn wall 4-7 of the box. which is detacha'hlyisef caredati'ts enter edgeto -thcllower.'edge o'fi" 1.10.

the front all by screws 4S, Whereby it- 1s:

adapted to fls'svh'lg with said front wall.

7 In practice the wall 33; whichist'hei onh perrnanent. wall of the box,andwhirhpforms .the; bottom faceof the-block orarticle, may

be plain surfaced, while the front, 'endf'and bot-tom walls. "which are detachable; torn) patterns which may he designed to" give an preferred shape to .tl' e walls of the hlouh formed thereby, the Constrm-thm de cribed .120 permitting of the'nlse 'ot'an desired kinds. of pattern plates. The rear all""nmlune. ever, he designed to produce lil'hVd-lhSll'ttl ornamental finish. hut this. of vourscpis mil essential.

front wall lfikuh lo figgithrlinalharsfor'ri 49; having their ends \XltIlLlI-llgf h'eyonkl the ing lugs 01' projections 5t), eachj haying'a eo5,57e

- closed position. Fach of these lockingdo vices comprises a lriangular locking member 53 pivotally connectedwith thecross piece .charge points, 2 showing the which slides on the guides 27,

,form a cavity in the top 42 for movement in a vertical plane and having outwardly extending diverging loci:- ing arms 54: whose outer or free ends are properly constructed to engage the notches 52 in the lugs 50. The ends of the bars :1 are provided with slots or eyes through 'whichlthe lugs project when the walls are closed, thus coupling the 'front wall with the end walls, which latter are held from outward movement by the engagement of the arms of'the locking devices'with the lugs. A stop pin 56 is provided upon each end wall to engage one of the arms of the locking device when the latter is in looking position, to limit the downward movement of said device, and the latter is provided on a line between its locking arms with a handle or lever 57 by which it may be swung up-.

ward to release the arms from engagement with the lugs, to permit the walls to be thrown open. By this-construction a simpleand effective type of locking means is provided by which the movable walls will be held securely in closed position and sustained to support the strain falling upon them during thecompressi-on of the material into a block. \Vhen the front wall is closed, the bot-tom wall 47 will also be in position to close the bottom of the mold, as will be readily understood. A pallet board 58 is adapted to be arranged on the inner side of the front wall 45 to forni a pattern and to support the block when removed from the mold and discharged upon the receiving table 31.

In the operation of the apparatus, the carrier may be intermittently rotated by hand or power to successively bring the mold boxes at the filling, compression and disboxes arranged at these respective points. Preliminarily to filling each box, the box is'closed, as will be readily understood, and is then supplied in any suitable manner with a charge of the concrete or plastic material which is to be compressed. The carrier is then given a one-third revolution to bring the filled mold box between the compression head and core, at which time the compression forced upwardly, carrying wlt-h it the box so that the core is caused to enter the top of the box and of the plastic material,- as well as to compress the material to produces finished block of the desired density. After the completion of the compressing aotlon, the

head and box are position.

head is lowered and the; tableagain given a onetlnrd revolution to bring the succeeding tilled box into compressing condition, to move the box containing the completed block to discharge position over the table 31, and'to move the preceding box which has just been emptied of its contents to filling The carrier is stably supported and guided in its movements so as to permit just sulficient clearance between the box, compression head and core to permit the box to move easily between the head and core.

When the box is lowered after the compressing action its lugs 36 engage the stops 26 at the outer ends of the arms 23, thus locking the box to the carrier frame so that'it cannot possibly have any independent movement during its further travel, so that the box will be strongly supported and the guide relieved to a large extent from the strain of the weight thereof. As each box containing a formed block moves over the table 31, the operator releases the locking devices and swings the end walls of the box open, after which the front wall is swung outwardly and downwardly upon the table, carrying with it the bottom wall 47, by which these walls will be adjusted to the posit-ion shown in Fig. (3, so that the block will rest upon the pallet board 48, which may then be slid oil the wall onto the table 31, from which W the block still resting on the pallet board may be removed and carried to a drying rack. The walls of the box are then closed, the carrier turned to bring the box to filling position, and the cycle of operation repeated as above described. t

The fluid n'essure'mechanism for operating the ram is preferably of the hydraulic type, but any suitable fluid pressure mechanism may be employed. It is designed in practice to continuously use a supply of water, which may be replenished at periods to compensate for that lost by evaporation or leakage, but'oil or anyother suitable liquid may be used, if desired. 0n the base 9 is mounted a storage tank or chest 59 having an outlet connection 60 controlled by a check valve (31. connnunication beyond the valve through feed pipes ('32 with the discharge ports of pump cylinders 63 mounted on the base on opposite sides of said tank or chest. Operating within said cylinders are pistons or plunger-s, the rods (3% of which are coupled by connecting rods 65 with the straps oi cc cent'riesGG on a drive shaft 67 journaled in bearings 68 on the upper end of the standards 10, which shaft also carries fast and loose pulleys 69 and 70 for cotiperation with the drive belt leading from a suitable source of power. The pumps operate to draw water through the outlet connection-60 and pipes 62 into the cylinders, the check "valve 61 opening to permitwater to discharge from This connection (30 is in f the tank and then closing to prevc'nt its return, and then force the water from the cylinders through thepipes 6'2 int-a supply "pipe 71 connected by a union 72 with the lower end of the ram cylinder 12, and the water vis returned to the tanlr'through a re turn pipe 7 The outer or forward ends of thetwofpipes T1 and 8 extend in parallel relation to apoint.- beyond the carrier in the central line of the machine and on opposite sides of the box filling and discharge points,

where the said pipes extend upwardly in-the form of .a loop and are united by :a union M'carrying a gage by which the pressure ofthefloiving liquid may be determinedat any time. In the 1111101174 18 a controlling valve 76 which'is adapted to be manipulated by the operator to control the ascent and descent of the ram l3.

driven pumps 'are continuously operated, there is a, constant flow of water under fliictuating pressuretroni' the tank to the pumps, thence outward through the supply pipe 71 and finally back to thetank through the re- ,turn pipe 73 when the yalve 7G is opened.

As a result, the Water is circulated under such conditions without influencing the ram 13, "When a boxis in position between the rain and core, however, for a compressing 'action,-th e operator"closes the vah 'e 176, thus 'cutting ofl' communication between the two pipes 71 and73 by which the fluid pumped into the pipe-71 is caused to rise into the cylinder 12 and elevate the plunger 13,' carrying with it the compression head 14;," wherebythe box is elevated andjthe material therein compressed. Through the variation or fluctuat on 1n the volume'of flow of the .water'there is' a proportionate variation 01" fluctuation of pressure in the cylinder 12 by "which avib'ratory compression action of the- "plungerfl is produced, which action may be increased or diminished by the operator through proper man pulation ot the valve 4' 6. .As a result, a pounding pressure is established, by which the air cells in the body of the material are lnolren-and thefair' perniitted to escapeand the particles of the mater-ial are com ressed to a high degree of density to form a'lioinogeiieous .bloclr' of" greatstrength to withstand service and which is practicallyimpervious to moisture throughout. This mode of compressing the IllfllQlltrllS an important feature of my invention, as it produces a superior type of When the ma; terial has been compressed to the desired block for the reasons stated.

' extent, the Valve 76 is opene(l,'tliiis restor- 'ing communici-ition between the supply and return pipes, by which the water is caused to exhaust from the cylinder 12 and lower the ram and mold box, and. is. returned through the pipe73 to the storage tank 59.

Theyalve 76is so" arranged with'relation to the table 31 that, in cases of emergency, a

As the .eccentrically single attendant may control the valvean d I during the time period of compression release the block from the filled mold."- It will be observed that the construction and arrangement of'parts adapt the machine to be. thoroughly and eifectually controlled by a minimumnumber of attendants, two being commonly employed, but a single attendant in case of necessity may operate the machine at. reduced speed.

In order to enable the table to be controlled and to lock it firmly againstmove inent when the boxes are in their respective filling, compressing and discharge positions,

the rim 29- of the "carrier is provided at" equidistant points on lines between the boxes with looking notches 77 and ratchet teeth-'78, These teeth and dog'to slack the momentum of the carrier as it is swungaround, so that the carrier will-be at nearly 'a state ot rest when the dog snaps into a receiving notch in order to prevent; strain upon the parts at the'time' of the locking action. lVhen it is desired tore-- turnthe, carrier the dog is released by the carrier,- whereupon the carrier may be moved by hand or power to the desired degree,"the dog instituting alocking action on the next succeeding, set of teeth, aswill be readily understood.

From the foregoing description, taken in connection with the drawings, the construction and imideof operation of niy niproved molding RPDQI'MHS-WVlllbQ readily understood, and it will be seen that it provides an" apparatus which possesses great strength and du ability and enables the material tobe compressed to a high degree of density,

which is adapted to be easily operated.and

controlled. and by: the" use ofwhicha maxi mum number oi blocks or'articlesnia'y be produced within a given period of; time.

While have described the apparatus as of the horizontal type, it will be understood that it may be vertically arranged, and that other changes falling within the spirit. and scope or the nvention as defined in the appended claims inay'be made without departing from the invention.

Having thus fully described the invention What is cla med asnew, ,is':-' l 1. A molding apparatus embodying a mold box, forniingnieans cooperating therewith,

said means including a movable element, a fluid pressure mechanism for moving said element to compression position, said mesh},

The 7 anism including a pumping means operative to produce variations of pressure in the supplied fluid,- to cause said movable element to vibrate and exerta pounding pressure on the material.

y 2. A"molding apparatus embodying a receptacle for the material. means for'compressing the material, said means including a movable element, fluid pressure means for .operatmg said element. said means includ-.

ing a'pumping mechanism operativeto produce a fluctuating fluid pressure to cause said movable-element to exert a vibratory or pounding pressure on the material, and manually controlled means for further varying the fluctuations of'th'e fluid pressure and the vibratory action of the movable elements.

3. A' molding apparatus embodying a receptacle for the material, means for compressing the material, said means including a movable element, .a hydraulic ram for actuat ng said element, a pumping mechanism for supplying fluid'for the ram, said pumpvi-ng mechanism operatingto automatically produce fluctuationsof pressure in the. supply of fluid to effect a vibratory pounding motion of said element, and manually controlled means for increasing or diminishing the fluctuations of pressure. v

4. A molding apparatus embodying afrece'ptacle for the material. means for compressing the material, said means including a movable pressure element, a hydraulic cir- 'cu it includinga ram for operating said element, and a pounding niecl anisni operative to forcefiuid under fluctuating pressures through said circuit, to cause said element ,to exert a Vibratory or pounding pressure on the'inateriali 4(1- 5-."A molding apparatus embodying a sta- .tionary' form'ing element, a mold box mov able toward and from the same, a pressure element for moving the mold box, a 'hy- 'draulic ram for operating said pressure element, a fluid pressure circuit connectedwith the ram, and a pumpingmechanism' connected with the circuitand constructedto force a fluid therethroughwith variable fluctuations of-pressure.

ceptacle for the material, coinpressingmeans cooperating with said receptacle, a -hydraulic ram for producing a relative motion of the v parts, and a hydraulic circuit connected with the ram and. including a pump constructed to-force the acting fluid under a constantly 'fiuctuatingpressure. 4

7. A molding apparatus compris ng a frame, a stationary forming plane carried by the frame, a pressure element arranged in. line with said forming element, a mold box mounted to move into and out of alineme'nt with said elements and toward and'from the forming element, a flow circuit,-a' hy-v draulic ram arranged in said circuit for 013-.

end pieces provided ,with. inwardly ofi'set members hinged to the. fixed side at'a point 6. A'molding apparatus comprising a re-' crating the pressure element, and a pumping mechanism for forcing the fluid through said pumping mechanism being constructed to force fluid-with a fluctuating pressure.

8; A molding apparatus embodying a frame, a stationary core carried by the frame, a mold box movable toward and from v the core, a plunger for advancing and retracting the mold box, and fluid pressure means for operating the plunger to provide an automatic vibratory feed motion thereof and a pounding pressure on the material,

said fluid'pressure means including a pump having a variable forcing action. t I

'9. In a molding apparatus, a mold. box having a stationary side and stationary frame pieces at the ends thereof, a hinged side carried by the end pieces, a bottom'fixed to and movable with the hinged side, swinging in rear of the body thereof, and locking means for connecting the hinged sides and ends' 10.; in a molding apparatus, a mold box having a stationary side and stationary fraine pieces at the ends thereof,ja hinged side carr ed by said 'frame pieces and provided with locking projections, a bottom carried by and pieces and provided at its ends with locking projections, end piccesjprovidcd with bars having slotted-keepers at their forward ends forth'e reception of said projections and inwardly bent rear ends hinged to the strengthening members of the stationary side, and pivoted locking devices having locking arms to engage said projections,

12. A molding apparatus embodying a press, a fluid pressure supplying means including a pumping mechanism for vibrating the movable member of the press, said. pumping mechanism being normally operative for producing fluctuations in the fluid pressure and consequent variable vibrations of the movable member of the press to cause the same to exert a pounding pressure on the material being compressed. f

13. A molding apparatus compris ng a press, fluid pressure means for automatically imparting a vibratory pounding motion to the movable member of the press, and means for controlling the How of the fluid pressure to vary the normal vibratory 3Ct1OI1.

.in a circular path 1113011 the frame, mold 14. A. molding a'ppa 'atus comprising a frame, an annular carrier mountedto' rotate boxes mounted uponand beyond the per riphery of said carrier. a stationary forming element uponthewf'amedisposed atone point in the path of, movement of the moldboxes, and fluid-pressureoperated means locatcdin lin e,with said forming element, for successivehyadjust mg the mold boxes toward and from the same,-

15. A vmolding" appi'rratus comprising a frame, an annular carrier mounted to rotate upon the f 21111 3, said carrier being provided with guides and abutments, mold-hoxes disposed upoirand projecting'beyond the peripheryie he carrier, said boxes being slidably mounted, on the guides and provided with ab'utinents to engage said abutmentson the carrier, whereby the boxes are adapted to be held rigidly against lateral movement when in retracted. positioiu a forming element mounted upon the frame at onepoint' in the path of travel of the boxes. and fluid pressure operated means disposed in line with said element for adjusting the box-neon the guides toward and. rt-o the same 16. A molding apparatus comprising a. fina e, an annular carrier mounted to rotate upon'the frame, said carrier comprising upper and lower frame portions and guide rods connecting the same, mold boxes projecting beyond the peripheryof the carrier and slid-v ably' mounted on said rods, a stationary forming element supported by the frame in line with one point. in the path of movement of the i'nold-boxes, fluid pressure operated meansdisposed in line with said eleme'nt for I adjusting-the moldboxes .on the guiderods ing the head toward and from the core. an I toward and from said element, and means tracting the mold box. and means. for op erating the plunger, to produce a normal automatic vibratory feed motion. 'tl'iereoti. and a-pounding pre. si

ire on the material. a 18. A moldingap' iar'atns en'ibo l \i1ig a fame, a stationary core carried bythe frame, a pressure head in guided connection with the frame for movement toward and from'the core. a hjdraulic i'ilung r for mov annular rotary carrier on the frame. carrying a series of mold boxes a rrangcd. upon the periphery thereof-and intcrmitteiiil \'.nioi able between the core and head and movable by thche'ad towardihe core.- a lrrdraulic'. circuit includ-inga pump and a evliiuler in which-said plunger is mounted. and a matrollingval've in said circuit.

v 19 molding apparatus comprising a frame embodying tri 'ngular. upper and lower portions formed connected beams, and vertical ti'e ro ds connecting said beams, astaTtionary-core carried by the upper portion of the frame between the rods a pressure ":heild in guided connection" with the other rod for, movement toward and from th'e oore, an annular rotary carrier on the other rod, a series of mold'hoxes arranged"- theplunger is mounted and a. regulating upon the frame said carrier being provided withequidistantly ar angcd sets of speed checking and locking elements, mold boxes mounted upon-the carrier, forming means arranged for cooperation with the boxes-at one point-in their path of travel, and a locking device arranged for cooperation with said. sets of checking andlocking de vices for diminishing the speed of the carrier and locking the same from movement as each mold box movesinto forming position.

QlQA molding" apparatus comprising a frame, an annular rotary carrier mountedupon the frame, said. carrier being provided with equ-idistantly arranged sets of ratchet. teeth and lockinglnotches mold boxes supported by the rotary carrier, forming means arrangedffor cooperation with the boxes at one point in their path of movement, and a spring controlledspeed checking and looking device arranged for-cooperation with said ratchet teeth and locking notches, to arrest the s'peed of the carrier and look the same for movement as each mold box'moves into forming position.

- 29. A molding apparatus 'comprisingia triangular ,groupofrods connecting-the or frame formed ofbottoni and head beams, a I

posite ends of said" beams, a carrier mounted Y to rotate upon the single rodconnecting the beamsat one end and'supnorting a' series'of inoi able nold boxes, ,-a fixed, forming ele-. f

ment si'uiported' by'the head beams at one point in, the path-of travel of the boxes, a pressure head slidably mount-edon the rods connecting the opposite ends of the frame beams. and a fluid pressure operated plunger for raising and lowcring sa-id head. .93. A molding apparatus comprising a frame, a .'rotary carrier mounted on the frame; mold boxes morably mounted --on the carrier,' aiixed -f0r1-ni11g element-- upon the fra1ne,a mova-ble'lmadon the frame for adv 5 including a pumping mechanism for producing a fluctuating pressure, to effect a vibratory motion of the head When-the box is in formin position; g

' 24. mo ding a aratus comprising a Ufa stationed? ble" toward and from the actuating the said box, ervoir, a circuit leading dkmbodying' supply and return Same, Pl I a fluid storage therefrom 1'5 portions pumping mef communicating with the I ."supply portion of' the ciro it andfj'adaptedto force the fluid With a 1 flugtuating pressure through the latter, and

20 a pr sure. 1

forming element, a

alve in said circuit for regulating said.

at their remote ends, a

embodying a' stationary. side, stationary 1 frame piecesat the ends thereof, a hinged side carried by said frame pieces and havdiig notched locking projections at the ends thereof, a bottom carried by and movable with the hinged side, hinged ends provided with slotted guide members for the passage of said locking projections, vertically swinging locking devices on the ends and having locking arms to engage the notches in the locking projections, and means for limiting the swinging movement of said locking devices in one dlrectlon.

In testimony whereof I aflix my signature FRANoEsT. BANNOn, SADIE E. BAKER.

25. In a molding apparatus, a mold box 

